docs(qemu-sbsa): describe what we get from QEMU

QEMU provides us with minimal information about hardware platform using
minimalistic DeviceTree. This is not a Linux DeviceTree. It is not even
a firmware DeviceTree.

Change-Id: I7b6cc5f53a4f78a9ed69bc7fc2fa1a69ea65428d
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
1 file changed